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BIZ MK - Microphone Preamplifier and DI
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Introducing the Biz Mk: the same Biz you love with two new features:
- Mic / Line switch for rack input
- Bridging line input for high output mics or line level sources
- Use with our Moiyn 8x2 mixer module in the Sweet Ten rack for mic or line mixing
- DI Load switch for front panel input
- 33kohms as in the original Biz or 100kohms for a more open tone
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A unique sounding, three amplifier, discrete microphone preamp module designed to work in standard "500" racks.
The smooth Gain control helps you dial in the sound you want. If the output level is too high (the Class A/B output opamp can pump out up to +27 dBu), you can ride the level down with the separate Level control. Pressing the "Dual" switch splits the gain between two of our Class A opamps, enabling up to 75 dBu of clean gain, making the Biz a perfect match for ribbon microphones.
With different Gain, Level, and Dual settings the Biz can produce an infinite variety of tonal variations with the same amount of output level. The front panel DI helps you record instruments and line level sources with unrivaled clarity and punch. Two LEDs clearly indicate signal level for the gain and output stages at a glance, turning green to indicate signal present, yellow for 10dB below clipping, and red for clipping.
For easy serviceability and tweaking, the Purple discrete opamps can be replaced with any standard discrete opamp or a DIP-8 IC. The Biz uses our custom output transformer which provides two isolated outputs (when supported by the chassis).
Specs:
- Maximum output level +27dBu
- Frequency response 10hz – 70kHz +/- 1db (3db down at 100kHz)
- Transformer input:
Mic mode
- Maximum gain 60dB in single mode
- Maximum gain 75dB in dual mode
Line mode
- Maximum gain 35dB in single mode
- Maximum gain 50dB in dual mode
- Direct input:
- Maximum gain 30dB in single mode
- Maximum gain 40dB in dual mode
Beginning Serial Number 1600 February 2008:
- Over Current Resettable Fused (prevents any module problem from affecting your rack)
- ROHS - Lead Free
Simplified Block Diagram:
Biz Pinout
- Pin 1: Chassis Ground
- Pin 2: Output A +
- Pin 3: Output B + (Purple Audio Rack Only - XLR OUT 2)
- Pin 4: Output A -
- Pin 5: Audio Ground
- Pin 6: Output B - (Purple Audio Rack Only - XLR OUT 2)
- Pin 7: Input -
- Pin 8: Input -
- Pin 9: Input +
- Pin 10: Input +
- Pin 11: NC
- Pin 12: +15 or 16VDC 80ma
- Pin 13: Audio Ground
- Pin 14: -15 or 16VDC 80ma
- Pin 15: +48VDC
Retail Price $675 USD. Buy factory direct or through select
dealers.
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The
review
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Users say:
- I just wanted to drop you a line to let you know how much I like
the Biz module I purchased from you. Over the past two weeks I have been tracking a bunch of electric guitar (Les Paul and Marshall JCM-800) and we went through a pretty thorough
comparison of quite a few different flavors of pre amp that I have in my set up. We put an AEA R-92 ribbon in front of an old Marshall 4X12 cab and went to town. The candidates were: API
312, API 512C, API 512A, Biz, OSA MP-L3, OSA MP-L, Chandler LTD-1, a pre from an E-Series SSL, and an old Ampex 351. All were great sounding in their own way, but both the player and
I continually came back to the Biz and ended up using it for a majority of the tracks with some Chandler (for the 1073-esque flavor) and the 512C thrown in to add some different flavor. I
found the Biz module to be big and thick – but not tubby. Aggressive – but not too edgy, and overall a very complimentary pre for the amp/guitar/mic combo we were using.
- I knew a product like this from you guys would be very good, but I have to say that the Biz is a stellar pre amp. I also intend to spread the word to my other 500-Series brothers :) Great
product!
-Dave from Los Angeles
- I'm really enjoying your products. I have a couple A-Designs P-1's and API 521c's. They're both great pres... but they just don't seem to "KILL" like the "BIZ" does.
Thanks for the prompt help and the fantastic pres. I always tell everyone who will listen about your pres.
-Klauth
- Purple Audio's The BIZ is the rock of my preamp collection. I have
many preamp flavors to draw on in my rack – Telefunken V-76's, Trident
B Range modules, API's, Tube Tech – and the BIZ is my "Go To" preamp
for just about everything. Vocals, Bass, and Drums all sparkle
through the BIZ – and guitars – instant wood! I've sold many of my
other 500 form factor preamps and replaced them with the BIZ – the
range of colours available through the BIZ is astounding. You can
really dial in a sound, be it crystal clear cleans to dirty dirty
dirty. And the I/O meters really keep me in control of my gain
structure. The BIZ is truly the BIZ!!! Can't wait to hear the other
500 series modules Purple has cooking. The BIZ is an absolute home
run!
-Jamie Saft
Frank Booth Industries
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Purple modules are not attempts to recreate or copy an existing product; instead they are new products that fit in a familiar form factor.
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